<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form method="post">
      {% module xsrf_form_html() %}
      <input type="text" name="message"/>
      <input type="submit" value="Post"/>
    </form>
</body>
</html>